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Submarines submerge and surface by changing the average density of the hull.
Waves play an extremely important role in many areas of our lives.
This animation introduces the studies of astronomers and physicists whose works fundamentally...
Simple harmonic motion can be considered to be the one-dimensional projection of uniform...
A spacecraft on its path is in a constant state of free fall.
Surface tension is the property of a liquid that allows it to obtain the smallest surface area...
A force can be measured by measuring the twisting of the torsion wire in a torsion balance.
A hot air balloon is a balloon aircraft in which is lifted by hot air.